The Switch IS a handheld. You don't think it is? I definitely see it as a hand-held that connects to your TV, rather than a home console that you can take on the go.
I'll say one thing about my son's 3DS. That sucker was built to last! I cannot tell you how many times that thing has been dropped, stepped on, left in the car in the heat/cold, etc and it just keeps on ticking! That thing is a TANK!
That's something I've always loved about Nintendo hardware and accessories. While Nintendo may not always use the most cutting edge specs, they definitely do not skimp when it comes to build quality. The original NES was cheaply made. However it's top loading re-design wasn't and from that model, through to today, every single Nintendo console/handheld I've owned has been built with quality components. Their products never feel "chincy" and are always among the lowest in terms of failure rate.